Typewriting machine



Feb. 7. 1925. 1,526,854

E. B. HESS TYPEWRITING momma mewuw. 1924 2 Sheets-Sheet 2 Patented Feb. 17, 1925.

EDWARD B. HESS, OF NEW YORK, N. Y.,

PATENT 0FFICE.

ASSIGNOR. 'I'O ROYAL TYPEWRITER GOM- PANY, INC., 01 NEW YORK, N. '1 A GORYORATION OF NEW YORK.

TYPEW'RITI'NG MACHINE.

Application filed July 3,

To allwhom it may concern:

Be it known that I, EDWARD B. Hnss, a citizen ofthe United States, residing in New York, in the county and State of New York, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

This invention relates to the paper feeding and guiding mechanism of tvpewriting machines. In the Royal standard machine as heretofore sold, the paper is fed around the platen by a group of feed rolls which can be released when it is desired to insert or adjust paper upon the platen. There have also been provided combined pressure and feeding rolls which normally hold the paper against the top of the platen after it has passed the printing point. These upper pressure rolls may be moved from their normal or working on top. of the platen to a position in the rear of the platen.

In my application filed April 15,1924, Serial No. 706,738, I have shown a construction in which the upper rolls are not only capable of such movement to the rear of the platen, but also have an independent movement from their position in contact with the platen to a position a considerable distance in front of the platen so that there is a clear space between these pressure rolls and the platen. Paper fed round the platen will move upwardly between the platen and these rolls when in their forward position without any manipulation.

The present invention is an improvement on or modification of my prior case mentioned above, and relates to overhead pressure rollers carried by a freely hung bail which can be moved to a forward position in front of the platen and islocked in position only when it is at or near the platen.

There is provided the usual side arms of the common overhead bail which are pivoted to the carriage frame in the rear of the platen, and are normally spring drawn to wards the platen. Carried by links pivoted to said side arms near their front ends is a transverse rod upon which is mounted rotatable and longitudinally adjustable feed rolls. The side arms and links are provided with interlocking detent mechanism which tends to retain the arms and links in a definite relation to each other. Springs tend to pull the arms toward the platen and 1924:. Serial No. 724,075.

cause the rolls to bear yieldingly thereon when in operative position.

Further features of the invention will be set forth in the following detailed description and the appended claims.

In the drawings:

Flgure 1 is a top plan view of the inven tion in its operative relation to the platen.

Figure 2 is a fragmentary view of parts of a typewriting machine embodying the invention, looking at the right side of the machine.

Figure 3 shows both side elevation and top plan view of a modified detent mecha' nism.

Figure 4 shows a top plan, partly in section, of another modified detent mechanism.

Figure 5 shows a side elevation of a modified bail mounting.

The drawings illustrate portions of a typewriting machine including a carriage shift frame A, carriage B, platen 0, paper apron D, a swinging paper table E pivoted at e, and a transverse frame bar F and margin stop rack G connecting the side members of the carriage frame. These parts are of the usual construction found in the Royal standard machine and need no specific description. So far as the invention is concerned they may be of other forms, either old or new.

The. overhead rearwardly swinging bail is similar to that found in the Royal standard machine. It comprises side frame members L, L which are pivotally connected with the carriage side plates at Z) in such manner that the bail may be swung about these pivots rearwardly from the position shown in Figure 2 to a position at the rear of the paper table. These side frame members are connected by a cross bar M. Overthrow springs N are connected to the sides of the carriage and to the bail as indicated and hold the bail in either its inoperative position or in the operative position of Figure 2 at which time they press the rolls yieldingly against the platen.

A roll carrying rod 0 of the usual type is provided with a scale plate R and a plurality of rollers S which are rotatable on and adjustable along the rod 0. This rod is mounted in the free ends of links P and Q which are pivoted to the side frame mem bers L, L at p and 9. These links P and Q have oflset portions as indicated at p, 9 so that the rod may swing down inside of the side members L, L when in operative position, but the rod O is longer than the platen so that the pressure rolls may be moved to the extreme ends of the platen to bear on the outer edges of the paper, but paper of greater width than the platen may be inserted without interference from the bail or feed rolls.

In the form shown in Figures 1 and 2 the links P and Q extend slightly beyond the pivotal points of the rod O and are provided with holes or depressions T in which fit conical projections U on the ends of flat spring u fastened rigidly at u to the frame bars L and L. hen the links are moved to the operative position the projections U snap into the depressions T and hold the rod O against movement relatively to the side bars L and L. One or both of the links P, Q, may he provided with a finger piece V by which the rod O may be swung forwardly to a posit-ion free of the platen, the spring detents yielding to slight pressure. Paper which is fed around the platen will then pass up between the roll carrying rod O and the platen without any manipulation, and when the rod is moved back to normal position it will press the paper against the platen.

Figure 3 shows a modified form of detent in which a member having ears H is fastened to the side bars L, L, and a plunger 71 slides in these ears and is spring pressed in one direction by a spring 7L. This plunger has a free end shaped to engage in a notch k in the free ends of the links P and Q.

Figure 4 illustrates another form of detent in which a socket member I which may be screwed into the side bars L, L, has a bail i pressed outwardly by a spring i into engagement with the links P or Q, preferably engaging in a depression in the side of the free ends of these links.

Obviously other forms of detent mechanism may be employed, the purpose being merely to hold the roll carrying rod 0 and its side arms P and Q, in position to move with the side arms L, L which are pivoted to the carriage. The invention is independent of any specific detent construction.

One or both of the side arms L, L is provided with a depending projection J located in position to engage the side frame of the carriage, but when the rolls S are in engagement with the platen, there is a clearance w between these projections J and the carriage frame. By this construction the springs N which are connected to the side bars L, L" and to the carriage act to hold the rolls S against the platen with the desired pressure. When the roll carrying rod O is swung to forward position, the projections J engage the side bars of the carriage to hold the bail from moving too far downwardly.

To aid in holding the forwardly swinging bail in proper position relative to the side arms L, L the free ends of the latter may be provided with dwell portions on either side of a portion 3 which is concentric with the axis of the pivots 7), g, and an offsetprojection Y on the end of either or both of the links P and Q, is provided to engage in either of the dwell portions y, when the limit of movement in either direction is reached.

In the modification shown in Figure 5, the bail formed of the rod O and links P and Q, is the same as in the other figures, but instead of the links P and Q being pivoted to the side arms L, L of a rearwardly swinging bail, they are pivoted to arms Z rigidly fastened to the sides of the carriage B. Any of the forms of detent mechanism described above may be employed as indicated at 2, or some other form for holding the swinging frame in desired position.

Obviously certain detail changes may be be made within any manner departing from the spirit of the invention which is to be regarded as limited only by the terms of the appended claims.

I claim as my invention:

1. In a typewriting machine, the combination of a platen carriage, a frame having free front ends mounted therein to move rearwardly from operative position, a roll carrying bail carried directly by the front ends of said frame and independently movable forwardly from operative position, and means for latching said bail in definite relation to said frame.

2. In a typewriting machine, the combination of a platen carriage, a frame having free front ends mounted therein to move rearwardly from operative position, a roll carrying bail carried directly by the front ends of said frame and independently movable forwardly from operative position, and co-operating detent means carried by the frame and bail and latching the bail in definite relation to the frame.

3. In a typewriting machine, the combination of a platen carriage, a rocking frame having free front ends mounted therein to swing about an axis located behind the platen, a roll carrying bail carried directly by the front ends of said rocking frame and independently movable forwardly from operative position, and means for latching said bail in definite relation to said frame.

4. In a typewriting machine, the combination of a platen carriage, a rocking frame having free front ends mounted therein to swing about an axis located behind the platen, a roll carrying bail carried directly by the front ends of said rocking frame and independently movable forwardly from operative position, and (Jo-operating detent means carried by the frame and bail for holding the bail in definite relation to the frame.

5. In a typewriting machine, the combination of a platen carriage, a frame having free front ends mounted therein to swing rearwardly from operative position, a rollcarrying bail carried directly by the front ends of said frame and independently swinging forwardly from operative position, and means for latching said bail in definite relation to said frame.

6. In a typewriting machine, the combination of a platen carriage, a frame having free front ends mounted therein to move rearwardly from operative position, a rollcarrying bail carried directly by the front ends of said frame and independently movable forwardly from operative position, means for latching said bail in definite relation to said frame, and means for pressing the frame and bail toward the platen.

7. In a typewriting machine, the combination of a platen carriage, a frame having free front ends mounted therein to move rearwardly from operative position, a rollcarrying bail carried directly by the front ends of said frame and independently movable forwardly from operative position, means for latching said bail in definite relation to said frame, means for limiting the movement of the bail in each direction, and means for pressing the frame and bail toward the platen.

8. In a typewriting machine, the combination of a platen carriage, a frame carried thereby, a roll-carrying rod pivoted to said frame to turn about an axis located above and in front of the platen, rolls carried by said rod and engaging the top of the platen when in operative position but swinging forwardly to a position in front of the platen, and means for latching the rod in definite relation to said frame when in operative position.

In testimony whereof, I have hereunto subscribed my name.

' EDWARD B. HESS. 

